2011 Checkpoints Chapter 4 Momentum Question 127 C, D, E In every collision, momentum is conserved. So the initial momentum must equal the final momentum. Momentum (p) = mv. pi = m × 3 + m × -6 pi = -3m So pf = - 3m A = -7m + 4m = -3m B = 4m -m = 3m C = -3m + 0 = -3m D = -1.5 m - 1.5 m = -3m E = -5.5m + 2.5 m = -3m At this stage A, C, D, E are all possibilities. In any collision the energy (KE + PE) must be conserved or lost to other forms. If you consider…
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